<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
</head>
<body>
  <h1>注册</h1>
  <form action="reg" method="post">
      用户名:<input type="text" name="username"><br>
      密码:<input type="password" name="password"><br>
      昵称:<input type="text" name="nick"><br>
      年龄:<input type="text" name="age"><br>
      <input type="submit">
  </form>

</body>
</html>